I am currently using a 400H series CPU and communicate with the SM through the IM153 module of the ET200M. Our team is reviewing modules with KLV functionality and testing is in progress according to the usage environment.

In order to create an appropriate test scenario, we need to know when and under which conditions the KLV function will work. Please let me know if you know about this.
I would be grateful if you could share related manuals or documentation.

I hope you have a good year and a happy new year.

Thank you for answer.

First, KLV stands for Keep Last Value.
For example, I am using "6ES7 332-5RD00-0AB0" as an analog output module.
After inserting the module in HW Config of SIMATIC Manager, you can apply KLV on the Output tab of the module's Properties window.